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View Full Version here: : Good ol' Trifid in Hoo


that_guy
06-06-2018, 10:17 AM
Instead of using the inbuilt script for mapping HO in to colour channels, I manually just mapped Hydrogen to red, Oxygen to blue and green without creating a synthetic channel. I think I prefer it this way since it makes it more natural looking. Clouds were intermittent and SGP for some reason didn't do a automatic meridian flip (I think because I was mucking about in EQMOD settings a few days ago) so I had limited Oiii subs to work with. One great thing about running SGP nowadays is that I can set it running and go to sleep and wake up in the morning with the camera warmed up, darks taken and scope parked ;)

15x 300sec Ha
10x 600sec Oiii
same number of darks for each of the filters, no flats.

Full res astrobin here (https://www.astrobin.com/full/350134/0/?nc=user)

Atmos
06-06-2018, 01:08 PM
Very nice Tony :)
I do agree, you’ve picked a very natural narrowband colour scheme. Nice details and depth.

raymo
06-06-2018, 01:28 PM
How can it be more natural looking when the blue[of which there is a lot if
all colours are given equal billing] is almost obliterated?
Not only the blue is almost obliterated, but the nebular material itself that is normally
blue, is also nearly obliterated, so you've lost some of the nebula.
raymo

cometcatcher
06-06-2018, 02:21 PM
I quite like the HOO palette. Looks closest to RGB. You could do with some more OIII otherwise great shot.

that_guy
06-06-2018, 02:29 PM
When I mean natural looking, I mean the colour palette. Compared to the more yellow orange look of the traditional HOO with a synthetic green channel its more natural. The reason theres not much blue is because I don't have enough OIII data. The colour palette has nothing to do with losing nebulosity.

raymo
06-06-2018, 03:14 PM
Fair enough. Regarding the nebulosity, the blue nebulosity is so tenuous
that without its colour it becomes very faint indeed. I look forward to seeing it with more OIII.
raymo

rcheshire
09-06-2018, 10:02 AM
Quite apart from anything else, it is a nicely captured calibrated image.

xelasnave
09-06-2018, 11:55 AM
I like it.
Well done.
Alex